Date: Thu, 11 Mar 2004 12:48:08 -0500 From: "Brian F. Feldman" <green@freebsd.org> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-current@freebsd.org Subject: Re: I like SCHED_4BSD Message-ID: <200403111748.i2BHm9qc089773@green.homeunix.org> In-Reply-To: Message from Kris Kennaway <kris@obsecurity.org> <20040311044229.GA11614@xor.obsecurity.org>
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Kris Kennaway <kris@obsecurity.org> wrote: > On Wed, Mar 10, 2004 at 09:36:45PM -0600, Conrad Sabatier wrote: > > I just decided to revert to SCHED_4BSD for the time being. Why? > > > > o Better interactivity -- No mouse jerkiness, no sluggish screen updates when > > switching between virtual desktops, etc. > > > > o Better scheduling! I'm serious here. Watching top under SCHED_ULE, I'm > > seeing 10, 15, 20 seconds go by where ALL processes are sleeping. > > Processes seem to be spending inordinate amounts of time in the "kserel" > > state. This, of course, doesn't happen with SCHED_4BSD. > > That this observation may well be bogus, because you're trying to > measure the scheduler using a tool that is itself run by the > scheduler, so the process stats you see may not be representative of > what is really happening on your system. I don't think it's bogus. SCHED_ULE on my system effectively locks up the init/rc process and causes total deadlock if I hit ^T. It happens for Alfred, too. SCHED_4BSD works, though. -- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> green@FreeBSD.org \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\
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